Wang - Royal Academy Engineering, London 4 Nov 2009

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Wang - Royal Academy Engineering, London 4 Nov 2009

  1. 1. THE UNIVERSITY of BIRMINGHAMSupercritical Coal Fired Power Plant Dynamic Responses and p Grid Code Compliance - UK-China Collaboration Research on Cleaner Coal Technology Dr Jihong Wang Power and Control Systems Research Laboratory (PCSR) School of Electronic, Electrical and Computer Engineering University of Birmingham, Birmingham B15 2TT, UK University of Birmingham Birmingham B15 2TT UK 4th November 2009PCSR
  2. 2. Outline of the presentation 1. Project background 2. 2 Grid Code t d G id C d study 3. Dynamic responses and control 4. Future workPCSR
  3. 3. 1. Project background Supercritical coal fired power plants Subcritical Supercritical Ultra (conventional) supercritical Temperature (°C) 500 – 550 500 – 600 550 – 600, (600 – 700)* Pressure (MPa) 16 – 17 24 – 26 27 – 32, (40 – 42)* Features Drum: single Once through: Once through: reheat single reheat double reheat Efficiency cycle (%) 33 - 35 42 42 – 47, (50 – 55)*PCSR
  4. 4. 1. Project background WHY SUPERCRITICAL? More efficient: fuel combustion under supercritical conditions is much more efficient, leading to higher fuel conversion towards gas. Lower grade fuels are usable too. Fuel consumption savings and reduced flue gas emissions/MW. i i /MW This t h l Thi technology is compatible with some CO2 capture i tibl ith t technologies, which are under development.PCSR
  5. 5. 1. Project background Challenge? Ch ll ?PCSR
  6. 6. 1. Project background Study of supercritical coal fired power plant mathematical modelling and simulation. Objectives: • to understand the dynamic responses of supercritical power plants • to i investigate the possible strategies f i h ibl i for improvementPCSR
  7. 7. 1. Project background Project Title: P j Ti l Supercritical Coal Fired Power Plant Dynamic Responses and Grid Code Compliance - UK-China Collaboration Research on Cleaner Coal Technology Project Ref: EP/G062889/1 Investigators: Dr Jihong Wang School of Electronic Electrical and Computer Engineering Electronic, Dr Bushra Al-Duri School of Chemical Engineering Start Date: 1st December 2009PCSR
  8. 8. 2. Grid Code Study UK grid code requirement: System f S t frequency i a continuously changing is ti l h i variable that is determined and controlled by the careful balance between system demand and total generation. If demand is greater than generation, the frequency falls while if generation is greater than demand, the frequency rises. f iPCSR
  9. 9. 2. Grid Code StudyPCSR
  10. 10. 2. Grid Code Study For frequency control, each generating unit must satisfy the following minimum requirements: • fast acting proportional speed governor to provide continuous continuous, automatic and stable responseacross its entir operating range; • speed governor capable of being set to a droop of 3~5%; • minimum speed governor deadband no greater than 0 03 Hz (i e 0.03 (i.e. ±0.015Hz) • load control capability with target frequency setting of 50±0.1Hz either continuously or i 0 05H steps; ith ti l in 0.05Hz t • capability to control frequency to below 52Hz in island operation; • if operating at full load, capability to maintain power output; if frequency falls to 49.5Hz, thereafter a reduction in power output no more than pro-rota with frequency downto 47 Hz.PCSR
  11. 11. 2. Grid Code Study The Primary Response capability (P) of a Generating Unit or a CCGT Module or Power Park Module or DC Converter is the minimum increase in Active Power output between 10 and 30 seconds after the start of the ramp injection. This increase in Active Power output should be released increasingly with time p gy over the period 0 to 10 seconds from the time of the start of the Frequency. The Secondary Response capability (S) is the minimum increase in Active Power output between 30 seconds and 30 minutes after the start of the ramp injection injection.PCSR
  12. 12. 2. Grid Code Study UK grid code requirement: The High F Th Hi h Frequency R Response capability (H) of a Generating bilit f G ti Unit or a CCGT Module or Power Park Module or DC Converter is the decrease in Active Power output provided 10 seconds after the start of the ramp injection and sustained thereafter. This reduction in Active Power output should be released increasingly with time over the period 0 to 10 seconds from the time of the p start of the Frequency rise.PCSR
  13. 13. 2. Grid Code StudyPCSR
  14. 14. 2. Grid Code Study The GB Grid Code has more demanding requirements for frequency response than have previously been applied to this type of plants plants. Will the supercritical g p generation meet the requirement of the grid code? Increasing penetration of renewable energy i i f bl more demand on dynamic responses to thermal power plantsPCSR
  15. 15. 3. Dynamic responses and control Supercritical p turbine mill Mills  Mills -boiler To network transformer generator vPCSR
  16. 16. 3. Dynamic responses and control Initial work on mathematical modellingPCSR
  17. 17. 3. Dynamic responses and control Laboratory Test Oven / heater T & P recorder – Filter controller system Water cooled condenser Gas-liquid HP pump Separator Water tank Air-cooled condenser Back-pressure regulatorPCSR
  18. 18. 4. Summary What has been d Wh h b done? ? • Recruiting research staff and research students for the project; • Initial visiting to Chinese partners in September; • Comparison study of Grid Code of UK, China and Australia, which is essential for on-site data collection and analysis; • With permission, the Chinese p p , partners have pprovided us with the first set of plant data; • A student started working on plant modelling and the data are used for parameters identification; • Kick-off meeting was scheduled for 10th December 2009 at the University of Birmingham. On the same day, we will organise a UK-China workshop. UK China workshop 4 speakers from China and 4 Speakers from the UK have been confirmed for the day.PCSR

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